Entitlement programs must stay off the table in the next round of budget negotiations, Sen. Bernie Sanders (I-Vt.) said.

Sanders said he's "not confident" that President Obama will try to protect entitlements — particularly Social Security — during upcoming talks about raising the country's debt ceiling.

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"Well, we've got to make the president and Republicans and any Democrats that want to cut Social Security an offer they can`t refuse, and that is tens of millions of people have got to make it very clear to Congress -- Social Security has nothing to do with the deficit," Sanders said Friday night in an interview with MSNBC's Ed Schultz.

During the recently concluded talks to avoid the "fiscal cliff," the White House had agreed to changing the way inflation is calculated for Social Security benefits. Sanders and other liberal Democrats strongly resisted the idea, and have also protested cuts to Medicare and Medicaid.

Obama has proposed raising the Medicare eligibility age in previous talks with congressional Republicans. That idea could resurface as Republicans look for spending cuts to accompany another hike to the debt ceiling.